Re: [go-nuts] Working with characters in strings

['Thomas Bushnell, BSG' via golang-nuts]

Sorry, I did not mean to say they are restricted to UTF8. I was answering
the question "what is the relation between a rune and its byte
representation", by saying that the []byte cast of a string (assuming the
string only holds legitimate runes) is the UTF8 of the runes making it up.

The original question was confounded by asking about "characters" which is
a term that is pretty much only used by the reference in speaking of
program text; the only exception I could find is speaking of Unicode
replacement characters in talking about range iteration of strings.

My point is that the relation between a rune and its byte representation is
"UTF-8". I don't know whether the original question was using "character"
to mean "byte" (the curse of C!) or something else.

Thomas


On Mon, Oct 31, 2016 at 5:13 PM Lars Seipel  wrote:

> On Mon, Oct 31, 2016 at 06:06:23PM +, 'Thomas Bushnell, BSG' via
> golang-nuts wrote:
> > Strings are specified to be UTF8, so if you cast a string to []byte you
> > will see its UTF8 representation.
>
> They are not. A Go string may contain arbitrary bytes. Features like
> for..range or conversions to rune slices won't be very useful then
> (though still well-defined) but that's about it.
>
> Go source text and thus string literals are UTF-8. You might be thinking
> of those?
>
> -ls
>

-- 
You received this message because you are subscribed to the Google Groups 
"golang-nuts" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to golang-nuts+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Re: [go-nuts] Working with characters in strings

[Lars Seipel]

On Mon, Oct 31, 2016 at 06:06:23PM +, 'Thomas Bushnell, BSG' via 
golang-nuts wrote:
> Strings are specified to be UTF8, so if you cast a string to []byte you
> will see its UTF8 representation.

They are not. A Go string may contain arbitrary bytes. Features like
for..range or conversions to rune slices won't be very useful then
(though still well-defined) but that's about it.

Go source text and thus string literals are UTF-8. You might be thinking
of those?

-ls

-- 
You received this message because you are subscribed to the Google Groups 
"golang-nuts" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to golang-nuts+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Re: [go-nuts] Working with characters in strings

['Thomas Bushnell, BSG' via golang-nuts]

I don't know what you mean by "characters", since you're distinguishing
them from runes. Do you mean bytes?

Strings are specified to be UTF8, so if you cast a string to []byte you
will see its UTF8 representation.

Thomas

On Sat, Oct 29, 2016 at 4:42 AM  wrote:

>
> I understand that strings are immutable sequences of bytes and wanted to
> know how to idiomatically work with the "characters" within a string.
>
> For example how should I approach the following operations
>
>
>- Convert a string to a []string (slice or array). eg. "foobar" to
>["f" "o" "o" "b" "a" "r"]
>
>
>- Iterate through a string by "character" strings instead of runes,
>for example:
>
> str := "foo"
> for _,char := range "bar" {
> str += char // is a cast string(char) required?
> }
> fmt.Println(str) // print "foobar"
>
>
>
> Also what is the relationship between a rune and it's byte representation?
>
> Any additional advice for working with characters of strings would be
> appreciated as well.
>
> --
> You received this message because you are subscribed to the Google Groups
> "golang-nuts" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to golang-nuts+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.
>

-- 
You received this message because you are subscribed to the Google Groups 
"golang-nuts" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to golang-nuts+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[go-nuts] Working with "characters" in strings

[so . query]

I know that strings are an immutable sequence of bytes, so what would be 
the most idiomatic way to handle the following operations.


   - Convert a string to []string (slice) or [n]string (array). Eg. 
   "foobar" to ["f" "o" "o" "b" "a" "r"]


   - Iterate through a string and evaluate the rune directly as a string
   
str := "foo"

for _,char := range "bar" {

 // should concatenate a character at a time

  str += char // requires cast string(char) correct?

}


Also what is the relationship between a "rune" and the "byte" that a string 
is composed of?

If you have other advice for working with individual string "character" of 
a string for other scenarios I'd appreciate it.

-- 
You received this message because you are subscribed to the Google Groups 
"golang-nuts" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to golang-nuts+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[go-nuts] Working with characters in strings

[so . query]

I understand that strings are immutable sequences of bytes and wanted to 
know how to idiomatically work with the "characters" within a string.

For example how should I approach the following operations


   - Convert a string to a []string (slice or array). eg. "foobar" to ["f" 
   "o" "o" "b" "a" "r"]


   - Iterate through a string by "character" strings instead of runes, for 
   example:

str := "foo"
for _,char := range "bar" {
str += char // is a cast string(char) required?
}
fmt.Println(str) // print "foobar"



Also what is the relationship between a rune and it's byte representation?

Any additional advice for working with characters of strings would be 
appreciated as well.

-- 
You received this message because you are subscribed to the Google Groups 
"golang-nuts" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to golang-nuts+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.